The question Did dragons exist? eventually got closed as not being a very scientific question.
I thought it might be interesting to test whether it was rescuable by posing a different version https://skeptics.stackexchange.com/questions/7819/is-there-any-known-basis-for-the-widely-spread-myths-of-creatures-like-dragons but this is also closed on the grounds that it is really a question about belief and why people believe things, which is off topic.
I was really angling towards posing a question that would allow some hard evidence to be assessed such as the hyportheis in this book: The First Fossil Hunters: Dinosaurs, Mammoths, and Myth in Greek and Roman Times
I could pose what I think is a perfectly good Skeptics question by referencing the book and asking whether the hypothesis is reasonable. But that feels like putting the answer in the question which wouldn't make such a good question.
It is a dilemma. Reopen the why did people believe in them question with a focus on hard evidence or pose a unsatisfactory question about the idea that ancient fossils fed the early myths?